#include <stdio.h>
#include <complex.h>

int main(int argc, char** argv)
{
	complex double a = 3.0 + 4.0 * _Complex_I;
	complex double b = 5.0 + 6.0 * _Complex_I;

	complex double z1 = a + b;
	complex double z2 = a - b;
	complex double z3 = a * b;
	complex double z4 = a / b;
	
	printf("%f+%fI\n", creal(z1), cimag(z1));
	printf("%f+%fI\n", creal(z2), cimag(z2));
	printf("%f+%fI\n", creal(z3), cimag(z3));
	printf("%f+%fI\n", creal(z4), cimag(z4));
	return 0;
}